package com.atguigu.redis.single;

import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;

public class ContainerNotSafeDemo {
    public static void main(String[] args) {
        Map<String,String>map = new ConcurrentHashMap<>();
        for (int i = 0; i < 30; i++) {
            new Thread(()->{
               map.put(Thread.currentThread().getName(),UUID.randomUUID().toString().substring(0,8));
                System.out.println(map);
               },String.valueOf(i)).start();

        }
    }
}
